Clinical prediction model for inguinal hernia recurrence risk after transabdominal preperitoneal hernia repair surgery in elderly patients

Table 1 Comparison of demographic characteristics and baseline disease data between the two groups, n (%)/mean ± SD

Characteristic	Recurrence group (n = 40)	Nonrecurrence group (n = 260)	χ2/t	P value
Sex			6.909	0.006
Male	38 (95.00)	200 (76.92)
Female	2 (5.00)	60 (23.08)
Age			0.934	0.627
60-70 years	12 (30.00)	61 (23.46)
71-80 years	24 (60.00)	165 (63.46)
> 80 years	4 (10.00)	34 (13.08)
Preoperative BMI (kg/m2)	24.84 ± 2.04	22.07 ± 2.16	7.605	< 0.001
Smoking history	18 (45.00)	26 (10.00)	23.276	< 0.001
Drinking history	2 (5.00)	21 (8.08)	0.389	0.533
Hypertension	17 (42.50)	119 (45.77)	0.150	0.699
Diabetes mellitus	6 (15.00)	32 (12.31)	0.227	0.634
Coronary heart disease	3 (7.50)	20 (7.69)	0.077	0.782
Hyperlipidemia	20 (50.00)	136 (52.31)	0.074	0.786
Unilateral hernia	34 (85.00)	206 (79.23)	0.721	0.396
Bilateral hernia	6 (15.00)	54 (20.77)
Chronic constipation	12 (30.00)	25 (9.62)	11.504	0.001
Hernia type			0.366	0.833
Indirect hernia	31 (77.50)	201 (77.31)
Direct hernia	6 (15.00)	33 (12.69)
Combined hernia	3 (7.50)	26 (10.00)
Hernia sac adhesion			0.752	0.386
Mild	35 (87.50)	213 (81.92)
Moderate-to-severe	5 (12.50)	47 (18.08)
Incarcerated hernia	14 (35.00)	18 (6.92)	25.808	< 0.001

BMI: Body mass index.